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/**
* @file timestamp.c Timestamp helpers
*
* Copyright (C) 2010 Creytiv.com
*/
#include <re.h>
#include <baresip.h>
#include "core.h"
/**
* Check if a 32-bit timestamp wraps around
*
* @param ts_new Timestamp of the current packet
* @param ts_old Timestamp of the previous packet
*
* @return Integer describing the wrap-around
* @retval -1 backwards wrap-around
* @retval 0 no wrap-around
* @retval 1 forward wrap-around
*/
int timestamp_wrap(uint32_t ts_new, uint32_t ts_old)
{
int32_t delta;
if (ts_new < ts_old) {
delta = (int32_t)ts_new - (int32_t)ts_old;
if (delta > 0)
return 1;
}
else if ((int32_t)(ts_old - ts_new) > 0) {
return -1;
}
return 0;
}
/**
* Calculate the total timestamp duration, in timestamp units.
* The duration is calculated as the delta between the
* last extended timestamp and the first extended timestamp.
*
* @param ts Receiver timestamp struct
*
* @return Timestamp duration
*/
uint64_t timestamp_duration(const struct timestamp_recv *ts)
{
uint64_t last_ext;
if (!ts || !ts->is_set)
return 0;
last_ext = calc_extended_timestamp(ts->num_wraps, ts->last);
return last_ext - ts->first;
}
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